ESE's works engine tuner

[SwePatrick]

I tested to do a little different variants to the exhaust side but was questioning if the risk of film boiling was too big? is that something you have experience with?

I don´t think it will boil as you run water quite low in temp if running on petrol, say 40-50 degree celcius maximum.
If having good circulation it will let eventual steam rise upwards and into radiator.
But, if you pressurise the coolingsystem with ~1bar you raise the boiling point to about 120-125c

With that said, boiling isn´t dangerous, it´s the shockwaves steam produces.

in other words, no problems

[Muhr]

I don´t think it will boil as you run water quite low in temp if running on petrol, say 40-50 degree celcius maximum.
If having good circulation it will let eventual steam rise upwards and into radiator.
But, if you pressurise the coolingsystem with ~1bar you raise the boiling point to about 120-125c

With that said, boiling isn´t dangerous, it´s the shockwaves steam produces.

in other words, no problems

I'm sorry but I think we're talking about different things I'm talking about film boiling the stage after nucleate boiling

[shnaggs]

Muhr, are you drawing this cylinder in Fusion 360? It looks like it from the pictures. I use Fusion 360 and have been trying to figure out how one goes about drawing a cylinder with all the passages the way you want them in that program. I'm not proficient (obviously) in CAD drawing, but its neat to see what you have done.

[SwePatrick]

I'm sorry but I think we're talking about different things I'm talking about film boiling the stage after nucleate boiling

You lost me...

[SwePatrick]

No..
I googled it.
It was just that i was writing about.
If you have this concern, how does car manufacturers solve this problen in the heads with far more heat in exhaust than a twostroke?

Think about it for a while

[Larry Wiechman]

If you have this concern, how does car manufacturers solve this problen in the heads with far more heat in exhaust than a twostroke?

The modern trend is narrow coolant passages that promote high coolant velocity.

[Michael Moore]

I use Fusion 360 and have been trying to figure out how one goes about drawing a cylinder with all the passages the way you want them in that program.

I've not used Fusion 360 (I have Rhino and Alibre) but you might try modeling each passage individually then doing a Boolean subtraction from a large solid with each one. Remember to look for axes of symmetry that will let you draw a feature and then mirror it across the axis, reducing the amount you have to create.

cheers,
Michael

[SwePatrick]

The modern trend is narrow coolant passages that promote high coolant velocity.

And to get engine up to work temp as fast as possible to minimize pollution.

[diesel62]

Well that didn't work very well, only the most determined spikes got through. Maybe try again and amplify the original signal before running it through a bridge with the amp clipping the bigger signals to a max of 5 Volts for the Aduino digital input.



A small data logger, great idea. We use 4-20's at work, I will have to see if I can find a Voltage logger. Probable not ready for it yet as I don't have a decent signal, but it certainly makes sense. The loggers we use, typically multi channel and certified and run $2000+ so some pointers where to source something more affordable would be great.

Hi these might be interesting to keep an eye on. https://www.pokitmeter.com/
Especially if you are mobile

Sent from my SM-P555 using Tapatalk

[TZ350]

Hi these might be interesting to keep an eye on. https://www.pokitmeter.com/

Thanks, they look great.

[diesel62]

Thanks, they look great.

I have one ordered. Will let you know cheers

Sent from my SM-P555 using Tapatalk

[shnaggs]

I've not used Fusion 360 (I have Rhino and Alibre) but you might try modeling each passage individually then doing a Boolean subtraction from a large solid with each one. Remember to look for axes of symmetry that will let you draw a feature and then mirror it across the axis, reducing the amount you have to create.

cheers,
Michael

Thanks Michael,

I am pretty much a noob with this stuff, so bare with me. How would one go about actually modelling, say the A port of the RSA? I can do pretty easy stuff like, draw a shape as an entry to the port and then the same for the exit, and then create a loft to follow a spline curve, but that doesn't give me enough detail. would you just draw the cross section of the port ever few mm lets say, and then just loft that?

Thanks

[F5 Dave]

And to get engine up to work temp as fast as possible to minimize pollution.

To reduce the boundary layers to minimum. Water flow will shear through the middle path of least resistance. Drag as much away from the hot bit means less boundary insulation.

[Bert]

Well that didn't work very well, only the most determined spikes got through. Maybe try again and amplify the original signal before running it through a bridge with the amp clipping the bigger signals to a max of 5 Volts for the Aduino digital input.



A small data logger, great idea. We use 4-20's at work, I will have to see if I can find a Voltage logger. Probable not ready for it yet as I don't have a decent signal, but it certainly makes sense. The loggers we use, typically multi channel and certified and run $2000+ so some pointers where to source something more affordable would be great.

Give me a call on Monday afternoon Rob.
I’ll have a chat to our chief electronics engineer. We were playing with similar tech a few years (geophones); and constructed a cool amp system and high sampling rate data logger (there is likely to be some of the original dev boards in the workshop). From what you have descriped so far, I think these could be easily modded to suit you needs.

[TZ350]

Ok ... Thanks.